rullst-connect 6.0.0

OAuth2 Social Login for Rust web frameworks, inspired by Laravel Socialite.
Documentation 
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use crate::client::HttpClientExt;
use crate::error::ConnectError;
use crate::provider::Provider;
use crate::user::ConnectUser;
use async_trait::async_trait;
use base64::{Engine as _, engine::general_purpose};
use serde_json::Value;

crate::define_provider!(NotionProvider);

#[async_trait]
impl Provider for NotionProvider {
    fn redirect_url(&self) -> String {
        let mut params = crate::provider::build_oauth_params(
            &self.client_id,
            &self.redirect_url,
            &self.scopes,
            self.state.as_deref(),
            self.pkce_challenge.as_deref(),
        );
        params.append_pair("response_type", "code");
        params.append_pair("owner", "user");
        format!(
            "https://api.notion.com/v1/oauth/authorize?{}",
            params.finish()
        )
    }

    async fn get_user(&self, auth_code: &str) -> Result<ConnectUser, ConnectError> {
        let credentials = format!("{}:{}", self.client_id, self.client_secret);
        let encoded_credentials = general_purpose::STANDARD.encode(credentials.as_bytes());

        let token_res = self
            .http_client
            .post(self.token_url())
            .header("Authorization", format!("Basic {}", encoded_credentials))
            .json(&serde_json::json!({
                "grant_type": "authorization_code",
                "code": auth_code,
                "redirect_uri": self.redirect_url.as_str()
            }))
            .send()
            .await?
            .error_for_status()?
            .json::<Value>()
            .await?;

        let owner = &token_res["owner"]["user"];

        let access_token = token_res["access_token"].as_str().unwrap_or("").to_string();

        Ok(ConnectUser {
            id: owner["id"].as_str().unwrap_or("").to_string(),
            name: owner["name"].as_str().unwrap_or("").to_string(),
            email: owner["person"]["email"]
                .as_str()
                .map(|s: &str| s.to_string()),
            avatar_url: owner["avatar_url"].as_str().map(|s: &str| s.to_string()),
            access_token,
            refresh_token: token_res["refresh_token"]
                .as_str()
                .map(|s: &str| s.to_string()),
            expires_in: token_res["expires_in"]
                .as_u64()
                .or_else(|| token_res["expires_in"].as_i64().map(|v| v as u64)),
            raw_data: token_res, // Notion returns user data right in the token response
        })
    }

    async fn get_user_from_token(
        &self,
        access_token: &str,
    ) -> Result<ConnectUser, ConnectError> {
        let user_res = self
            .http_client
            .get("https://api.notion.com/v1/users/me")
            .header("Authorization", format!("Bearer {}", access_token))
            .header("Notion-Version", "2022-06-28")
            .send()
            .await?
            .json::<Value>()
            .await?;

        let user = if user_res["type"].as_str() == Some("bot") {
            &user_res["bot"]["owner"]["user"]
        } else {
            &user_res
        };

        Ok(ConnectUser {
            id: user["id"].as_str().unwrap_or("").to_string(),
            name: user["name"].as_str().unwrap_or("").to_string(),
            email: user["person"]["email"]
                .as_str()
                .map(|s: &str| s.to_string()),
            avatar_url: user["avatar_url"].as_str().map(|s: &str| s.to_string()),
            raw_data: user_res,
            access_token: access_token.to_string(),
            refresh_token: None,
            expires_in: None,
        })
    }

    fn token_url(&self) -> String {
        "https://api.notion.com/v1/oauth/token".to_string()
    }

    async fn refresh_token(
        &self,
        refresh_token: &str,
    ) -> Result<ConnectUser, crate::error::ConnectError> {
        let token_res = self
            .http_client
            .post(self.token_url())
            .form(&[
                ("client_id", self.client_id.as_str()),
                ("client_secret", self.client_secret.as_str()),
                ("refresh_token", refresh_token),
                ("grant_type", "refresh_token"),
            ])
            .send()
            .await?
            .error_for_status()?
            .json::<serde_json::Value>()
            .await?;

        if let Some(err) = token_res["error"].as_str() {
            let err_desc = token_res["error_description"].as_str().unwrap_or("");
            return Err(crate::error::ConnectError::Token(format!(
                "Provider returned error: {} - {}",
                err, err_desc
            )));
        }

        let access_token = token_res["access_token"].as_str().ok_or_else(|| {
            crate::error::ConnectError::Token(
                "Failed to get access_token during refresh".to_string(),
            )
        })?;

        let mut user = self.get_user_from_token(access_token).await?;
        user.refresh_token = token_res["refresh_token"].as_str().map(|s| s.to_string());
        user.expires_in = token_res["expires_in"]
            .as_u64()
            .or_else(|| token_res["expires_in"].as_i64().map(|v| v as u64));
        Ok(user)
    }
}